Do you think it negatively impacts your application if they know? I'm talking about either way from allo schools or DO schools.
Basically if you have competative stats for both sets of schools, they are going to at least assume that you have applied to MD schools as well as DO. It is common, a ton of applicants obviously do it. As long as you show that you are interested in DO and very interested in their school...it should not be an issue. If you give the impression that it is your second choice, that may hurt. Also, as everyone else had said, if you don't feel comfortable telling them, then don't.
One of my recommenders, a professor at a DO school, wrote in his letter that I was applying to both DO & MD programs. He did tell me what he wrote & why he wrote it, but he didnt discuss it with me before he sent the letters. Im not sure how many other recommenders might write something like this, but I thought Id throw it out .just so yall know its a possibility.
He wrote two different versions of the letter, & only mentioned my dual applications in the DO version. I dont think it hurt me at all.
I applied to NSU and thought that question on the secondary was a little too much info for them to ask, so I wrote a polite little statement that I would be happy to discuss the schools I applied to if I was granted an interview. I got an interview (I'm from NJ, not sure if that makes a difference), and one of my interviewers spent seriously the entire time (appx. 25 min.) he had with me interrogating me about that answer! I just said that I didn't think it had that much bearing on how good of a candidate I would be, and that if I was accepted to NSU I would definitely matriculate. The guy would not let up (didn't even give me a chance to tell him the schools I applied to), and I got my rejection letter in the mail. Moral of the story: If I were to do it again, I would probably just list all the schools I applied to, even though I still think it is a dumb question.